混合柱形二维光子晶体禁带特性研究  

Properties of Band Gap Research Based on Two-dimensional Photonic Crystal with Mixed Shapes of Rods

作　　者：汪杰[1] 朱娜[1] 成超[1] 颜晓[1] 

机构地区：[1]江苏大学计算机科学与通信工程学院,江苏镇江212013

出　　处：《光电子技术》2011年第2期121-124,128,共5页Optoelectronic Technology

基　　金：国家自然科学基金资助项目(60702056)

摘　　要：研究了正方形和圆形介质柱混合排列的二维光子晶体的能带特性。运用平面波展开法在正方形和正三角形晶格下将混合柱形与统一柱形光子晶体的禁带特性进行计算比较。仿真结果表明:对于正方形晶格,混合柱形使光子晶体的TM模高阶能带向低频方向移动,禁带的宽度和位置介于正方形柱体和圆形柱体之间。在正三角形晶格中,混合柱形光子晶体出现了明显的TE模禁带,而在全正方形和全圆形柱体中几乎不存在TE模禁带。同时能带频率向低频方向移动的现象也存在于正三角形晶格混合柱形光子晶体中。The band gap properties of photonic crystals with square and circular dielectric rods mixed arrangement are analyzed.The band gap properties of mixed shapes rods photonic crystal are compared with square rods and round rods ones compared by using plane wave expansion method.Simulation results show that for the square lattice,mixed shapes of rods make the higher-order bands of TM modes moving towards the low frequency range,whose width and location are between the square and round rods photonic crystal.In triangle lattice,a significant band gap is presented in photonic crystal with mixed shapes of rods in TE mode,while it is almost not presented in square and round rods crystals.The phenomenon of bands moving towards the low frequency range is also found in the triangle lattice mixed shapes rods photonic crystal.

关 键 词：光子晶体 平面波展开法 介质柱形状 禁带 

分 类 号：O76[理学—晶体学]